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-rw-r--r--sys/netinet/tcp_input.c2
-rw-r--r--sys/netinet/tcp_reass.c2
2 files changed, 4 insertions, 0 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
index e37b656..5277c46 100644
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -2748,6 +2748,8 @@ tcp_dooptions(struct tcpopt *to, u_char *cp, int cnt, int flags)
case TCPOPT_SACK:
if (optlen <= 2 || (optlen - 2) % TCPOLEN_SACK != 0)
continue;
+ if (flags & TO_SYN)
+ continue;
to->to_flags |= TOF_SACK;
to->to_nsacks = (optlen - 2) / TCPOLEN_SACK;
to->to_sacks = cp + 2;
diff --git a/sys/netinet/tcp_reass.c b/sys/netinet/tcp_reass.c
index e37b656..5277c46 100644
--- a/sys/netinet/tcp_reass.c
+++ b/sys/netinet/tcp_reass.c
@@ -2748,6 +2748,8 @@ tcp_dooptions(struct tcpopt *to, u_char *cp, int cnt, int flags)
case TCPOPT_SACK:
if (optlen <= 2 || (optlen - 2) % TCPOLEN_SACK != 0)
continue;
+ if (flags & TO_SYN)
+ continue;
to->to_flags |= TOF_SACK;
to->to_nsacks = (optlen - 2) / TCPOLEN_SACK;
to->to_sacks = cp + 2;
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